Feedback on enquiry- June to date

My phone was ****** and i needed to do a sim swap so, on the 28th June 2015, i went to my nearest 8ta branch (South Gate Mall) where i was advised that i cannot do the swap as i owe 8ta R 1000 for a contract that ended in 2013. I disputed this and asked for an explanation as to how this amount came about. I was promised feedback within 2 working days. On the 1st July 2015 i received a call from VVM Debtors advising me that 8ta has handed me over to them and i now owe an amount or R2000 odd. When i called 8ta, i spoke to numerous agents having to explain my issue over and over again. Eventually, Granny Malinga took the call, promised me feedback and to date no feedback has been received. In mid July, i called in again as Granny was avoiding me and not responding to my numerous (18 in total)emails, i spoke to Menzi Maguba who acknowledged that there was an error and that he would get back to me by 14 Aug. TO DATE- NO FEEDBACK. Both Granny and Menzi has been avoiding my calls, they let me hang on the line for ages and doesnt have the decency to give me a call back or mail me with feedback. I'm BEYOND FURIOUS and request that a MANAGER sorts this issue out asap. This is unacceptable..